Fault Protection and Coordinated Controls of Power Flow Controller in a Flexible DC Grid

Jianquan Liao, Zian Qin, Pavel Purgat, Niancheng Zhou, Qianggang Wang, Pavol Bauer

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

This paper analyses the fault current characteristics of a flexible DC grid with a power flow controller (PFC) and proposes a coordinated control method for suppression of fault currents between the PFC and the DC circuit breaker (DCCB). The equivalent circuits of the PFC during different stages of the DC fault are analyzed. Moreover, the influence of the output voltage of the PFC on the fault current is studied. After that, the current suppression characteristics of the current limiting reactor (CLR) and PFC are investigated. Due to the output voltage of the PFC can be flexibly adjusted during the DC fault, the fault current can be suppressed significantly by adjusting the output voltage of the PFC when the DC fault is detected. This paper adopts a bang-bang control for PFC during the fault. Finally, a simulation model was built in Matlab/Simulink to verify the fault current characteristics of the DC grid containing the PFC, and the coordinated control of the PFC was verified.
Original languageEnglish
Title of host publicationProceedings - 2021 IEEE 19th International Power Electronics and Motion Control Conference, PEMC 2021
Place of PublicationPiscataway
PublisherIEEE
Pages893-898
Number of pages6
ISBN (Electronic)978-1-7281-5660-6
ISBN (Print)978-1-7281-5661-3
DOIs
Publication statusPublished - 2021
Event2021 IEEE 19th International Power Electronics and Motion Control Conference (PEMC)
- The Silesian University of Technology, Online Conference/Gliwice, Poland
Duration: 25 Apr 202129 Apr 2021

Publication series

NameProceedings - 2021 IEEE 19th International Power Electronics and Motion Control Conference, PEMC 2021

Conference

Conference2021 IEEE 19th International Power Electronics and Motion Control Conference (PEMC)
Abbreviated titlePEMC 2021
Country/TerritoryPoland
CityOnline Conference/Gliwice
Period25/04/2129/04/21

Keywords

  • DC fault
  • DC grid
  • coordinated control
  • hybrid DC circuit breaker
  • power flow controller

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